[nrf noup] boards: nordic: Enable PSA RNG for nrf54h20

Noup since Ironside not available upstream and it is required
for PSA RNG.

This enables the PSA RNG as the default Zephyr entropy provider
for the nrf54h20dk cpuapp and cpurad targets.

Signed-off-by: Georgios Vasilakis <georgios.vasilakis@nordicsemi.no>
Signed-off-by: Sergey Korotkov <sergey.korotkov@nordicsemi.no>

Author: Vge0rge

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts

@@ -27,6 +27,7 @@
 		zephyr,bt-hci = &bt_hci_ipc0;
 		nordic,802154-spinel-ipc = &ipc0;
 		zephyr,canbus = &can120;
+		zephyr,entropy = &psa_rng;
 	};
 
 	aliases {
@@ -109,6 +110,11 @@
 			pwms = <&pwm130 0 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
 		};
 	};
+
+	psa_rng: psa-rng {
+		compatible = "zephyr,psa-crypto-rng";
+		status = "okay";
+	};
 };
 
 &cpuapp_bellboard {

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts

@@ -28,12 +28,18 @@
 		zephyr,ieee802154 = &cpurad_ieee802154;
 		zephyr,bt-hci-ipc = &ipc0;
 		nordic,802154-spinel-ipc = &ipc0;
+		zephyr,entropy = &psa_rng;
 	};
 
 	aliases {
 		ipc-to-cpusys = &cpurad_cpusys_ipc;
 		resetinfo = &cpurad_resetinfo;
 	};
+
+	psa_rng: psa-rng {
+		compatible = "zephyr,psa-crypto-rng";
+		status = "okay";
+	};
 };
 
 &cpurad_bellboard {